Commit 57732560 authored Oct 26, 2011 by Allan Stephens Committed by Paul Gortmaker Feb 06, 2012

tipc: Add missing broadcast link lock when sending NACK

Ensures that any attempt to send a NACK message over TIPC's broadcast
link has exclusive access to the link's main data structures, to prevent
interference with a simultaneous attempt to send other broadcast link
traffic (such as application-generated multicast messages).

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

parent 47361c87

net/tipc/bcast.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -340,8 +340,10 @@ static void bclink_send_nack(struct tipc_node *n_ptr)
		msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
		msg_set_bcast_tag(msg, tipc_own_tag);

		spin_lock_bh(&bc_lock);
		tipc_bearer_send(&bcbearer->bearer, buf, NULL);
		bcl->stats.sent_nacks++;
		spin_unlock_bh(&bc_lock);
		buf_discard(buf);

		/*

Admin message